Packetloss every minute on the dot for online gaming

I use a Linksys USB Wireless G adapater (WUSB54G) and a WRT54GS w/ Satori 4.0.

When I go play any online game, there will be a second of packetloss every minute exactly. I have tried my same setup with a Belkin router and there is no packetloss at all. Im thinking there is something messed up with the router. I took the router back and got a new one, and still the same issue.

I have tested the Linksys router using the original firmware, updated firmware, and Satori 4.0, and I still get the one minute interval packetloss.

The only wireless device I have in my house besides my wireless router/adapter is a 900Mhz phone. Using Netstumbler, there are no other wireless networks in the area. I have tried different channels and settings (as well as transmit power) in addition to adding on the new Linksys 7db attenas, and still the same one minute interval.